Ultra-High Performance Fibrous Ammonia Sensor with Full Degradability

Although portable sensors with real-time NH3 detection capability have been extensively investigated, the development and preparation of fibrous degradable NH3 sensors combining properties including high lightweight and flexibility, high integrability, eco-friendliness, as well as excellent sensing performances still remains a great challenge. In this work, through fabricating a multicomponent aerogel fiber with three-dimensional mesoporous structure, we developed a fully degradable fibrous NH3 sensor with super high sensing performances including high sensitivity (an ultrahigh response of 807% at 100 ppm of NH3), rapid response speed (the response and recovery time are 24.1 and 2.2 s respectively at 100 ppm of NH3), good selectivity, and ultralow trace levels of NH3 monitoring capability (1 ppb). Taking advantage of its great sensing performance, we fabricated an NH3 alert system by integrating the aerogel fiber with an alarm circuit for NH3 leakage warning and food spoilage alerting.